Empty space left upon scrolling

Hi there!
Thank you for this plugin!

My problem: when page scrolls the menu correctly positions itself at the top, but the wrapping div (#mysticky-wrap), which then assumes the height of the menu as inline style, actually remains at the original position, leaving an empty space gap between the header and the content.

By inspecting the code in the page I can see that by either taking the inline height off or adding a ‘position: fixed’ to that, the gap closes. Question is, how can I manage to make this actually happen? I can’t seem to find a way myself. What would be your solution, what would you suggest?

https://ww.wp.xz.cn/plugins/mystickymenu/